org.codehaus.groovy.control

Class SourceUnit

java.lang.Object

org.codehaus.groovy.control.ProcessingUnit

org.codehaus.groovy.control.SourceUnit

public class SourceUnit
extends ProcessingUnit

Provides an anchor for a single source unit (usually a script file) as it passes through the compiler system.

Author:

Chris Poirier, Bing Ran

Field Summary

Fields

Modifier and Type	Field and Description
protected ModuleNode	ast The root of the Abstract Syntax Tree for the source
protected Reduction	cst A Concrete Syntax Tree of the source
protected String	name A descriptive name of the source unit.
protected ReaderSource	source Where we can get Readers for our source unit

Fields inherited from class org.codehaus.groovy.control.ProcessingUnit

classLoader, configuration, errorCollector, phase, phaseComplete

Constructor Summary

Constructors

Constructor and Description
SourceUnit(File source, CompilerConfiguration configuration, GroovyClassLoader loader, ErrorCollector er) Initializes the SourceUnit from the specified file.
SourceUnit(String name, ReaderSource source, CompilerConfiguration flags, GroovyClassLoader loader, ErrorCollector er) Initializes the SourceUnit from existing machinery.
SourceUnit(String name, String source, CompilerConfiguration configuration, GroovyClassLoader loader, ErrorCollector er) Initializes the SourceUnit for a string of source.
SourceUnit(URL source, CompilerConfiguration configuration, GroovyClassLoader loader, ErrorCollector er) Initializes the SourceUnit from the specified URL.

Method Summary

Methods

Modifier and Type	Method and Description
void	addError(SyntaxException se) This method adds a SyntaxException to the error collector.
void	addException(Exception e) This method adds an exception to the error collector.
void	convert() Generates an AST from the CST.
static SourceUnit	create(String name, String source) A convenience routine to create a standalone SourceUnit on a String with defaults for almost everything that is configurable.
static SourceUnit	create(String name, String source, int tolerance) A convenience routine to create a standalone SourceUnit on a String with defaults for almost everything that is configurable.
boolean	failedWithUnexpectedEOF() Convenience routine, primarily for use by the InteractiveShell, that returns true if parse() failed with an unexpected EOF.
ModuleNode	getAST() Returns the Abstract Syntax Tree produced during convert()ing and expanded during later phases.
Reduction	getCST() Returns the Concrete Syntax Tree produced during parse()ing.
String	getName() Returns the name for the SourceUnit.
String	getSample(int line, int column, Janitor janitor) Returns a sampling of the source at the specified line and column, or null if it is unavailable.
ReaderSource	getSource()
protected boolean	isEofToken(Token token)
void	parse() Parses the source to a CST.

Methods inherited from class org.codehaus.groovy.control.ProcessingUnit

completePhase, configure, getClassLoader, getConfiguration, getErrorCollector, getPhase, getPhaseDescription, gotoPhase, nextPhase, setClassLoader, setConfiguration

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

source

protected ReaderSource source

Where we can get Readers for our source unit

name

protected String name

A descriptive name of the source unit. This name shouldn't be used for controlling the SourceUnit, it is only for error messages and to determine the name of the class for a script.

cst

protected Reduction cst

A Concrete Syntax Tree of the source

ast

protected ModuleNode ast

The root of the Abstract Syntax Tree for the source

Constructor Detail

SourceUnit

public SourceUnit(String name,
          ReaderSource source,
          CompilerConfiguration flags,
          GroovyClassLoader loader,
          ErrorCollector er)

Initializes the SourceUnit from existing machinery.

SourceUnit

public SourceUnit(File source,
          CompilerConfiguration configuration,
          GroovyClassLoader loader,
          ErrorCollector er)

Initializes the SourceUnit from the specified file.

SourceUnit

public SourceUnit(URL source,
          CompilerConfiguration configuration,
          GroovyClassLoader loader,
          ErrorCollector er)

Initializes the SourceUnit from the specified URL.

SourceUnit

public SourceUnit(String name,
          String source,
          CompilerConfiguration configuration,
          GroovyClassLoader loader,
          ErrorCollector er)

Initializes the SourceUnit for a string of source.

Method Detail

getName

public String getName()

Returns the name for the SourceUnit. This name shouldn't be used for controlling the SourceUnit, it is only for error messages

getCST

public Reduction getCST()

Returns the Concrete Syntax Tree produced during parse()ing.

getAST

public ModuleNode getAST()

Returns the Abstract Syntax Tree produced during convert()ing and expanded during later phases.

failedWithUnexpectedEOF

public boolean failedWithUnexpectedEOF()

Convenience routine, primarily for use by the InteractiveShell, that returns true if parse() failed with an unexpected EOF.

isEofToken

protected boolean isEofToken(Token token)

create

public static SourceUnit create(String name,
                String source)

A convenience routine to create a standalone SourceUnit on a String with defaults for almost everything that is configurable.

create

public static SourceUnit create(String name,
                String source,
                int tolerance)

A convenience routine to create a standalone SourceUnit on a String with defaults for almost everything that is configurable.

parse

public void parse()
           throws CompilationFailedException

Parses the source to a CST. You can retrieve it with getCST().

Throws:

CompilationFailedException

convert

public void convert()
             throws CompilationFailedException

Generates an AST from the CST. You can retrieve it with getAST().

Throws:

CompilationFailedException

getSample

public String getSample(int line,
               int column,
               Janitor janitor)

Returns a sampling of the source at the specified line and column, or null if it is unavailable.

addException

public void addException(Exception e)
                  throws CompilationFailedException

This method adds an exception to the error collector. The Exception most likely has no line number attached to it. For this reason you should use this method sparingly. Prefer using addError for syntax errors or add an error to the ErrorCollector directly by retrieving it with getErrorCollector().

Parameters:

e - the exception that occurred

Throws:

CompilationFailedException - on error

addError

public void addError(SyntaxException se)
              throws CompilationFailedException

This method adds a SyntaxException to the error collector. The exception should specify the line and column number of the error. This method should be reserved for real errors in the syntax of the SourceUnit. If your error is not in syntax, and is a semantic error, or more general error, then use addException or use the error collector directly by retrieving it with getErrorCollector().

Parameters:

se - the exception, which should have line and column information

Throws:

CompilationFailedException - on error

getSource

public ReaderSource getSource()